1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
#
# Copyright (c) 2014 ThoughtWorks, Inc.
#
# Pixelated is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Pixelated is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with Pixelated. If not, see <http://www.gnu.org/licenses/>.
import errno
import traceback
import sys
import os
from leap.mail.imap.fetch import LeapIncomingMail
from leap.mail.imap.account import SoledadBackedAccount
from leap.mail.imap.memorystore import MemoryStore
from leap.mail.imap.soledadstore import SoledadStore
from twisted.internet import reactor
from .nicknym import NickNym
from leap.auth import SRPAuth
from .soledad import SoledadSessionFactory
from .smtp import LeapSmtp
SESSIONS = {}
class LeapSession(object):
"""
A LEAP session.
Properties:
- ``smtp`` the smtp gateway instance (LeapSmtp).
- ``config`` the configuration for this session (LeapClientConfig).
- ``provider`` the responsible for interacting with provider.json (LeapProvider).
- ``user_auth`` the secure remote password session data after authenticating with LEAP. See http://en.wikipedia.org/wiki/Secure_Remote_Password_protocol (SRPSession)
- ``soledad_session`` the soledad session. See https://leap.se/soledad (LeapSecureRemotePassword)
- ``nicknym`` the nicknym instance. See https://leap.se/nicknym (NickNym)
- ``account`` the actual leap mail account. Implements Twisted imap4.IAccount and imap4.INamespacePresenter (SoledadBackedAccount)
- ``incoming_mail_fetcher`` Background job for fetching incoming mails from LEAP server (LeapIncomingMail)
"""
def __init__(self, provider, user_auth, soledad_session, nicknym, soledad_account, incoming_mail_fetcher, smtp):
self.smtp = smtp
self.config = provider.config
self.provider = provider
self.user_auth = user_auth
self.soledad_session = soledad_session
self.nicknym = nicknym
self.account = soledad_account
self.incoming_mail_fetcher = incoming_mail_fetcher
self.soledad_session.soledad.sync(defer_decryption=False)
self.nicknym.generate_openpgp_key()
if self.config.start_background_jobs:
self.start_background_jobs()
def account_email(self):
name = self.user_auth.username
return self.provider.address_for(name)
def close(self):
self.stop_background_jobs()
def start_background_jobs(self):
self.smtp.ensure_running()
reactor.callFromThread(self.incoming_mail_fetcher.start_loop)
def stop_background_jobs(self):
self.smtp.stop()
reactor.callFromThread(self.incoming_mail_fetcher.stop)
def sync(self):
try:
self.soledad_session.sync()
except:
traceback.print_exc(file=sys.stderr)
raise
class LeapSessionFactory(object):
def __init__(self, provider):
self._provider = provider
self._config = provider.config
def create(self, username, password):
key = self._session_key(username)
session = self._lookup_session(key)
if not session:
session = self._create_new_session(username, password)
self._remember_session(key, session)
return session
def _create_new_session(self, username, password):
self._create_dir(self._provider.config.leap_home)
self._provider.download_certificate()
srp_auth = SRPAuth(self._provider.api_uri, self._provider.local_ca_crt)
auth = srp_auth.authenticate(username, password)
account_email = self._provider.address_for(username)
soledad = SoledadSessionFactory.create(self._provider, auth.token, auth.uuid, password)
nicknym = self._create_nicknym(account_email, auth.token, auth.uuid, soledad)
account = self._create_account(auth.uuid, soledad)
incoming_mail_fetcher = self._create_incoming_mail_fetcher(nicknym, soledad, account, account_email)
smtp = LeapSmtp(self._provider, auth, nicknym.keymanager)
return LeapSession(self._provider, auth, soledad, nicknym, account, incoming_mail_fetcher, smtp)
def _lookup_session(self, key):
global SESSIONS
if key in SESSIONS:
return SESSIONS[key]
else:
return None
def _remember_session(self, key, session):
global SESSIONS
SESSIONS[key] = session
def _session_key(self, username):
return hash((self._provider, username))
def _create_dir(self, path):
try:
os.makedirs(path)
except OSError as exc:
if exc.errno == errno.EEXIST and os.path.isdir(path):
pass
else:
raise
def _create_nicknym(self, email_address, token, uuid, soledad_session):
return NickNym(self._provider, self._config, soledad_session, email_address, token, uuid)
def _create_account(self, uuid, soledad_session):
memstore = MemoryStore(permanent_store=SoledadStore(soledad_session.soledad))
return SoledadBackedAccount(uuid, soledad_session.soledad, memstore)
def _create_incoming_mail_fetcher(self, nicknym, soledad_session, account, email_address):
return LeapIncomingMail(nicknym.keymanager, soledad_session.soledad, account,
self._config.fetch_interval_in_s, email_address)
|
